Aquatic bird diversity in Kondakarla Ava Lake wet land at Visakhapatnam, Andhra Pradesh, India

Abstract

In the present investigation 65 species of water birds belonging to 8 orders, 21 families and 45 genera were recorded during the study period from June 2015 to May 2018 at Kondakarla Freshwater Lake. Orders, Charadriiformes were found to be the most dominant with 19 species followed by Ciconiiformes represented with 16 species, Anseriformes with 9 species, Passeriformes with 8 species, Gruiformes with 6 species, Coraciiformes with 4 species, Pelecaniformes with 2 species, Podicipediformes and Columbiformes were represented to one species each. The parentage of species composition was revealed that the abundance of avifauna was highest record, 39 species were common and occupied 60.00% in the total population, followed by the uncommon birds are 21 contributed to 32.31%, five species were rare category contributed to 7.68%. An average yearly population diversity was resulted that richness of species was 41.92, Shannon-Wiener diversity Index (H) was 1.56, Maximum possible diversity ln (S) 3.73 and Evenness (E) 0.42.